[1] Gilead Sci Inc, Foster City, CA 94404 USA
[2] Univ Florida, Gainesville, FL USA
[3] Henry Ford Hlth Syst, Detroit, MI USA
[4] Univ Toronto, Toronto, ON, Canada
[5] Duke Univ, Durham, NC USA
[6] Univ Texas Hlth Sci Ctr San Antonio, Texas Liver Inst, San Antonio, TX 78229 USA
[7] GI Specialists GA, Marietta, GA USA
[8] Casa Sollievo della Sofferenza Hosp, San Giovanni Rotondo, Italy
[9] Aukland City Hosp, Auckland, New Zealand